A vacuum drying and dehydration device and gasification furnace system

Abstract

The present invention provides a vacuum drying and dehydration device and a gasifier system, which relate to the technical field of coal chemical industry. The vacuum drying and dehydration device comprises a hopper, a gas-liquid separation component and a gas-liquid conveying pipeline. A partition plate is arranged in the hopper to divide the hopper into a first hopper and a second hopper. The hopper is divided into two independent compartments, namely the first hopper and the second hopper. Both small hoppers are sealed by a top plug valve and a bottom plug valve. The top plug valve is opened to convey the slag output from the gasifier discharge port to the first hopper or the second hopper. The regulating valve corresponding to the gas-liquid conveying pipeline is opened to use a vacuum pump to evacuate under heating conditions to perform the vacuum drying and dehydration process. After the dehydration is completed, the bottom plug valve is opened to discharge the solid slag. The first hopper and the second hopper are used alternately and cyclically to match the continuous operation of the slag scooper, with high dehydration efficiency, small device footprint and low operating cost.

Description

Technical Field

[0001] The present invention relates to the technical field of coal chemical industry, and in particular to a vacuum drying and dehydration device and a gasification furnace system. Background Art

[0002] At present, liquid slag gasifiers are widely used in coal chemical enterprises, which can improve the utilization efficiency of coal and reduce the emission of pollutants. However, the liquid waste slag produced after gasification will have a certain negative impact on the ecological environment. Due to the high water content in the slag, the slag is constantly drained during the loading process, resulting in a poor environment in the slag water loading area and a large amount of water resources wasted. In addition, during the transportation of slag trucks, black water is constantly drained, causing partial collapse of the slag transportation road, seriously affecting the transportation road and the surrounding environment.

[0003] In order to reduce the moisture content in the coarse slag, most companies use sedimentation method, classification or high-frequency vibration screening method, high-temperature drying and heating method and airing method to dehydrate the coarse slag, as follows:

[0004] The sedimentation method requires the construction of several sedimentation pools. The coarse slag produced in the gasifier is sedimented and dehydrated in different sedimentation pools. The coarse slag in the last sedimentation pool is grabbed out with a grab bucket to complete the coarse slag dehydration. This method occupies a large area, takes a long sedimentation time, and has a poor dehydration effect.

[0005] The grading or high-frequency vibration screening method is generally divided into two stages of dehydration, including primary vibration screening dehydration and secondary vibration screening dehydration. The intermediate process requires the installation of coarse slag buffer tanks, belt conveyors, etc. This type of method has high investment and operating costs, and the dehydration effect is not ideal.

[0006] The high-temperature drying heating method uses high-temperature steam or hot air for direct heating and drying. This method requires large blowers and heating equipment, has high operating energy consumption and cost, and occupies a large area.

[0007] In view of this, this application is filed. Summary of the invention

[0008] The object of the present invention is to provide a vacuum drying and dehydration device and a gasifier system, which can significantly improve the efficiency of dehydration of coarse slag in the gasifier, and the equipment occupies a small area and has low operating costs.

[0009] The embodiments of the present invention can be implemented as follows:

[0010] In a first aspect, the present invention provides a vacuum drying and dehydration device, comprising a hopper, a gas-liquid separation component and a gas-liquid conveying pipeline, wherein a partition plate is provided in the hopper to divide the hopper into a first hopper and a second hopper;

[0011] The first hopper and the second hopper each include a hopper body with openings at the top and the bottom, a top gate valve for sealing the top of the hopper body, and a bottom gate valve for sealing the bottom of the hopper body. The top openings of the hopper bodies of the first hopper and the second hopper each face the feed port of the gasifier, and the top gate valve and the bottom gate valve are both detachably connected to the hopper body.

[0012] The gas-liquid separation component includes a gas-liquid separation tank and a vacuum pump connected to the top of the gas-liquid separation tank, the gas-liquid delivery pipeline includes a first gas-liquid delivery pipeline and a second gas-liquid delivery pipeline, the inlet of the first gas-liquid delivery pipeline is connected to the first hopper, the inlet of the second gas-liquid delivery pipeline is connected to the second hopper, and the outlets of the first gas-liquid delivery pipeline and the second gas-liquid delivery pipeline are both connected to the inlet of the gas-liquid separation tank; the first gas-liquid delivery pipeline and the second gas-liquid delivery pipeline are both provided with regulating valves;

[0013] The hopper is provided with a heater for heating the first hopper and the second hopper.

[0014] In an optional embodiment, the height of the other end face of the first hopper opposite to the partition plate is higher than the height of the partition plate, and the height of the other end face of the second hopper opposite to the partition plate is higher than the height of the partition plate, so that the top end face of the hopper is low in the middle and high on both sides.

[0015] In an optional embodiment, the inlet end of the first gas-liquid delivery pipeline extends from the bottom gate valve on the first hopper into the first hopper, and the inlet end of the second gas-liquid delivery pipeline extends from the bottom gate valve on the second hopper into the second hopper; the first gas-liquid delivery pipeline and the second gas-liquid delivery pipeline both include vertical hoses, and the regulating valves on the first gas-liquid delivery pipeline and the second gas-liquid delivery pipeline are both located between the vertical hose and the bottom gate valve.

[0016] In an optional embodiment, the bottom gate valve and the top gate valve on the first hopper and the second hopper both include a valve plate for serving as a sealing cover;

[0017] The valve plates on the two bottom plug-in valves are both provided with side plates arranged around the valve plates, the top walls of the side plates are provided with filter screens, and the side plates and the valve plates form a filtrate tank for containing filtrate.

[0018] In an optional embodiment, the bottom gate valve and the top gate valve on the first hopper and the second hopper each include a driving member for driving the valve plate to control the bottom gate valve and the top gate valve to be opened or closed.

[0019] In an optional embodiment, the valve plates of the bottom gate valve and the top gate valve are both provided with sealing members for sealing connection with the top or bottom of the hopper.

[0020] In an alternative embodiment, the heater comprises a heating coil disposed around a hopper body on the first hopper and the second hopper.

[0021] In an optional embodiment, a filtrate pump is further included, and a feed end of the filtrate pump is connected to the bottom of the gas-liquid separation tank.

[0022] In an optional embodiment, a controller is also included, and a liquid level detection mechanism is also provided on the gas-liquid separation tank. The liquid level detection mechanism is communicatively connected to the controller, and the filtrate pump and the vacuum pump are electrically connected to the controller so that the controller controls the operation of the filtrate pump and the vacuum pump according to the detected liquid level information.

[0023] In a second aspect, the present invention provides a gasification furnace system, comprising the vacuum drying and dehydration device of any one of the aforementioned embodiments.

[0024] The beneficial effects of the embodiments of the present invention are as follows: the hopper is divided into two independent compartments, namely the first hopper and the second hopper. Both small hoppers are sealed by the top gate valve and the bottom gate valve. The top gate valve can be opened to transport the slag output from the gasifier discharge port to the first hopper or the second hopper. When the top gate valve and the bottom gate valve are both sealed, the regulating valve of the corresponding gas-liquid delivery pipeline is opened, and a vacuum pump can be used to evacuate under heating conditions to perform the vacuum drying and dehydration process; after dehydration is completed, the bottom gate valve is opened to unload the solid slag. The first hopper and the second hopper are used alternately and cyclically to match the continuous operation of the slag remover. The two small hoppers can be intermittently fed with materials in batches to achieve complete sealing of the hoppers, which greatly improves the vacuum effect. Therefore, the vacuum drying and dehydration device provided by the present invention has the advantages of high dehydration efficiency, and the device occupies a small area and has low operating costs, and has a good market application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of the structure of a vacuum drying and dehydration device provided in an embodiment of the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of the structure of the middle hopper.

[0028] Icons: 100-vacuum drying and dehydration device; 110-hopper; 111-first hopper; 112-second hopper; 113-partition plate; 114-hopper body; 115-top plug valve; 116-bottom plug valve; 117-filter screen; 118-filtrate tank; 101-valve plate; 102-side plate; 120-heater; 121-heating heat source inlet; 122-heating heat source outlet; 130-gas-liquid conveying pipeline; 131-first gas-liquid conveying pipeline; 132-second gas-liquid conveying pipeline; 133-vertical hose; 134-regulating valve; 140-gas-liquid separation component; 141-gas-liquid separation tank; 142-vacuum pump; 143-filtrate pump; 144-water vapor discharge pipe; 145-filtrate recovery pipe; 146-liquid level detection mechanism; 150-slag car; 001-discharging port. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0035] Please refer to Figure 1 The present embodiment provides a vacuum drying and dehydration device 100, including a hopper 110, a heater 120, a gas-liquid conveying pipeline 130 and a gas-liquid separation component 140. The hopper 110 is used to receive liquid slag output from the discharge port 001 of the gasifier. The heater 120 is used to heat the hopper 110, and the gas-liquid conveying pipeline 130 is used to convey the gas-liquid material to the gas-liquid separation component 140 for gas-liquid separation. At the same time, the vacuum pump 142 can be used to evacuate the hopper 110, so as to realize the process of vacuum drying and dehydration.

[0036] It should be noted that vacuum drying and dehydration utilizes the fact that the boiling point of water in the material decreases under vacuum conditions. Under heating conditions, a large amount of water undergoes vaporization phase change and is discharged through the vacuum system, thereby significantly reducing the moisture content of the coarse slag material and achieving dry slag discharge.

[0037] A partition plate 113 is provided inside the hopper 110 to divide the hopper 110 into a first hopper 111 and a second hopper 112. The two small hoppers 110 can be regarded as two compartments. By controlling the two compartments to be used alternately and cyclically to match the continuous operation of the slag scooping machine, the efficiency of coarse slag dehydration is significantly improved. Since the two small hoppers 110 need to be vacuumed separately during the process, the two small hoppers 110 need to be completely sealed.

[0038] Furthermore, the first hopper 111 and the second hopper 112 each include a hopper body 114 with openings at the top and the bottom, a top gate valve 115 for sealing the top of the hopper body 114, and a bottom gate valve 116 for sealing the bottom of the hopper body 114. The top openings of the hopper bodies 114 of the first hopper 111 and the second hopper 112 are both directly facing the discharge port 001 of the gasifier, and the top gate valve 115 and the bottom gate valve 116 are both detachably connected to the hopper body 114. The two small hoppers are both capped by the top gate valve 115 and the bottom gate valve 116. The top gate valve 115 can be opened to transport the slag output from the gasifier discharge port 001 to the first hopper 111 or the second hopper 112. When the top gate valve 115 and the bottom gate valve 116 are both sealed, the regulating valve 134 corresponding to the gas-liquid delivery pipeline 130 is opened, and a vacuum pump can be used to evacuate under heating conditions to perform a vacuum drying and dehydration process; after dehydration is completed, the bottom gate valve is opened to discharge the solid slag (it can be discharged to the slag car 150 below). The first hopper 111 and the second hopper 112 are used alternately and cyclically to match the continuous operation of the slag scooping machine.

[0039] Specifically, when the top gate valve 115 and the bottom gate valve 116 cover the hopper body 114, each group needs to be sealed to vacuum the first hopper 111 and the second hopper 112. The overall shape of the hopper body 114 is not limited, and can be a hexahedral structure as shown in the figure.

[0040] In some embodiments, please refer to Figure 1 and Figure 2 , the height of the other end surface of the first hopper 111 opposite to the partition plate 113 is higher than the height of the partition plate 113, and the height of the other end surface of the second hopper 112 opposite to the partition plate 113 is higher than the height of the partition plate 113, so that the top end surface of the hopper 110 is in a state of being low in the middle and high on both sides. In this way, when the first hopper 111 is in a sealed state for vacuuming, only the top gate valve 115 on the second hopper 112 is opened for feeding, and the slag falling on the top gate valve 115 on the first hopper 111 falls into the second hopper 112 under the action of gravity, and only a single small hopper is fed.

[0041] In some embodiments, the bottom gate valve 116 and the top gate valve 115 on the first hopper 111 and the second hopper 112 both include a valve plate 101 for sealing, and the shape and size of the valve plate 101 match the inlet and outlet shapes of the hopper body 114, and can achieve complete sealing when covered. Therefore, in order to increase the sealing effect, the valve plates 101 of the bottom gate valve 116 and the top gate valve 115 are both provided with sealing members (not shown) for sealing connection with the top or bottom of the hopper 110, such as sealing strips.

[0042] In some embodiments, the bottom gate valve 116 and the top gate valve 115 on the first hopper 111 and the second hopper 112 each include a driving member (not shown) for driving the valve plate 101 to control the opening or closing of the bottom gate valve 116 and the top gate valve 115. The driving member may be a general cylinder, etc., which can control the opening and closing of the bottom gate valve 116 and the top gate valve 115.

[0043] Furthermore, in order to better achieve the separation of solid and liquid, the valve plates 101 on the two bottom gate valves 116 are both provided with side plates 102 arranged around the valve plates 101, and the top wall of the side plates 102 is provided with filter screens 117, and the side plates 102 and the valve plates 101 form a filtrate tank 118 for holding the filtrate. The slag material output from the discharge port 001 is separated into solid and liquid in the two small hoppers, the solid is on the filter screen 117, and the liquid falls into the filtrate tank 118 below, and the liquid can be output through the gas-liquid conveying pipeline 130, and the solid slag material on the filter screen 117 can be unloaded into the slag truck 150 when the bottom gate valve 116 is opened.

[0044] Specifically, the filter screen 117 can be separated by the CDcd surface and divided into two filter screens; the filtrate tank 118 is also separated by the CDcd surface and divided into two tank bodies. The filtrate tank 118, the filter screen 117 and the valve plate 101 together constitute a bottom plug valve 116, namely M3 and M4.

[0045] The heater 120 is used to heat the first hopper 111 and the second hopper 112 , and it can be a general electric heating device, and the specific structure is not limited.

[0046] In some embodiments, the heater 120 includes a heating coil disposed around the hopper body 114 on the first hopper 111 and the second hopper 112, and the heating coil has a heating heat source inlet 121 and a heating heat source outlet 122. The heat source is input from the heating heat source inlet 121 and output from the heating heat source outlet 122 after heat exchange in the hopper 110. Indirect heating can be performed using hot air, hot water or steam, with low-pressure steam and hot water being the best.

[0047] The gas-liquid separation component 140 includes a gas-liquid separation tank 141 and a vacuum pump 142 connected to the top of the gas-liquid separation tank 141. The gas-liquid delivery pipeline 130 includes a first gas-liquid delivery pipeline 131 and a second gas-liquid delivery pipeline 132. The inlet of the first gas-liquid delivery pipeline 131 is connected to the first hopper 111, the inlet of the second gas-liquid delivery pipeline 132 is connected to the second hopper 112, and the outlets of the first gas-liquid delivery pipeline 131 and the second gas-liquid delivery pipeline 132 are both connected to the inlet of the gas-liquid separation tank 141. The first gas-liquid delivery pipeline 131 and the second gas-liquid delivery pipeline 132 are both provided with regulating valves 134. By adjusting the switches of the two regulating valves 134, the first hopper 111 or the second hopper 112 can be adjusted to be vacuumed. Generally, the two regulating valves 134 are in a state of one open and one closed.

[0048] In some embodiments, the inlet end of the first gas-liquid delivery pipeline 131 extends from the bottom gate valve 116 on the first hopper 111 into the first hopper 111, and the inlet end of the second gas-liquid delivery pipeline 132 extends from the bottom gate valve 116 on the second hopper 112 into the second hopper 112; the first gas-liquid delivery pipeline 131 and the second gas-liquid delivery pipeline 132 both include a vertical hose 133, and the regulating valves 134 on the first gas-liquid delivery pipeline 131 and the second gas-liquid delivery pipeline 132 are both located between the vertical hose 133 and the bottom gate valve 116. By providing the vertical hose 133, the bottom gate valve 116 can be moved with the bottom gate valve 116 when the bottom gate valve 116 is opened, which is convenient for operation. Specifically, the first gas-liquid delivery pipeline 131 and the second gas-liquid delivery pipeline 132 can be connected to the inlet of the gas-liquid separation tank 141 through a section of the main pipe.

[0049] In some embodiments, the gas-liquid separation component 140 further includes a filtrate pump 143, and the feed end of the filtrate pump 143 is connected to the bottom of the gas-liquid separation tank 141. In this way, the gas output from the top of the gas-liquid separation tank 141 is transported by the vacuum pump 142, and emptied or recovered through the water vapor discharge pipe 144; the filtrate separated by the gas-liquid separation tank 141 is output through the filtrate pump 143, and returned to the device through the filtrate recovery pipe 145 for recycling, thereby reducing the water resource consumption of the device and achieving energy-saving effect.

[0050] In some embodiments, the gas-liquid separation component 140 also includes a controller, and a liquid level detection mechanism 146 is also provided on the gas-liquid separation tank 141, and a liquid level alarm mechanism can also be provided in cooperation, the liquid level detection mechanism 146 is communicatively connected to the controller, and the filtrate pump 143 and the vacuum pump 142 are electrically connected to the controller, so that the controller controls the filtrate pump 143 and the vacuum pump 142 to work according to the detected liquid level information. When the gas-liquid separation tank 141 is at a high liquid level, the controller controls the vacuum pump 142 to stop working, turns on the filtrate pump 143, and returns the filtrate to the device through the filtrate recovery pipe 145 for recycling; when the filtrate in the gas-liquid separation tank 141 is at a low liquid level, the controller controls the filtrate pump 143 to stop working, turns on the vacuum pump 142, and performs normal vacuum drying and dehydration operations.

[0051] The process technology route of the vacuum drying and dehydration device 100 is as follows: the hopper 110 is used to receive the liquid material from the discharge port 001, and after heating through the heating coil and vacuuming by the vacuum pump 142, the moisture in the material after heating undergoes a vaporization phase change under high temperature and vacuum conditions (both conditions are indispensable, otherwise the moisture in the pores of the material is difficult to undergo a vaporization phase change), and the water vapor passes through the filter 117, the vertical hose 133 and its connecting pipes, and then enters the gas-liquid separation tank 141 for separation, and the separated gas is emptied or recovered through the vacuum pump 142 and the water vapor discharge pipe 144, and the separated filtrate is sent to the device for recycling through the filtrate pump 143 and the filtrate recovery pipe 145.

[0052] More specifically, the gate valve M1 on the ABCD plane, the gate valve M2 on the CDEF plane, the gate valve M3 on the abcd plane, and the gate valve M4 on the cdef plane. The gate valves M1 and M2 are arranged with an inward slope to facilitate the collection of materials; the gate valves M3 and M4 are arranged horizontally (non-slope hopper) to expand the contact area between the bottom filter and the material in the hopper, that is, to increase the vacuum area of ​​the bottom material and enhance the vacuum dehydration effect. The description of the process of combining each valve plate for a working cycle:

[0053] (1) When the hopper 110, the connecting pipes and the gas-liquid separation tank 141 are emptied, open the regulating valve 134 below the first hopper 111, start the vacuum pump 142, open the gate valve M1 to receive the material (other gate valves remain closed), turn on the heating coil heat source, and while the BDbd compartment continues to receive the material, the heating coil continues to heat the material, and at the same time, the vacuum pump 142 continues to evacuate the material in the first hopper 111 to initially remove the moisture in the material.

[0054] (2) When the BDbd compartment is full of materials, close the gate valve M1 and open the gate valve M2 to collect materials from the DFdf compartment. At this time, the BDbd compartment is a fully enclosed space. As the vacuum pump runs, the BDbd compartment is evacuated (open the regulating valve 134 under the BDbd compartment and close the other valve). The negative pressure in the space will drop rapidly, and the moisture in the material will quickly undergo a phase change and vaporize under high temperature conditions. A large amount of water vapor passes through the filter 117 and enters the gas-liquid separation tank 141 for separation. The removed moisture is temporarily collected in the gas-liquid separation tank 141.

[0055] (3) During the vacuum drying and dehydration process of the BDbd compartment materials, the DFdf compartment materials are also collected. At this time, the regulating valve 134 below the DFdf compartment is opened and the other valve is closed. At this time, the vacuum system begins to vacuum dry and dehydrate the DFdf compartment materials. At the same time, the gate valve M3 is opened to unload the dehydrated materials in the BDbd compartment into the slag car 150. After the unloading is completed, the gate valve M1 is opened and M2 is closed, and the next cycle of collecting materials, heating and vacuum drying processes in the BDbd compartment is started.

[0056] An embodiment of the present invention provides a gasification furnace system, including the vacuum drying and dehydration device 100 of any one of the aforementioned embodiments, and may also include a gasification furnace and other equipment.

[0057] Application Example 1

[0058] Take a coal-to-methanol plant as an example. The gasification system of the plant adopts dry coal powder gasification technology, and the gasifier adopts liquid slag removal technology. The original design is that the coarse slag produced by the gasifier is scooped out by the slag scooping machine and continuously discharged from the discharge port 001. The moisture content of the discharged coarse slag is 40%. During the slag discharge and vehicle transportation process, a large amount of water falls on the ground, polluting the factory and road environment, and also causing a waste of water resources.

[0059] After the technical solution of this application is adopted for technical transformation, the operation is as follows:

[0060] First, open the gate valve M1 and close the gate valves M2 / M3 / M4. The coarse slag removed by the slag remover first enters the hopper of the BDbd compartment for collection. At the same time, the inlet of the heating coil is the same as the steam condensate of the on-site device, and the condensate valve is opened to heat the material in the hopper with the on-site steam condensate. Open the regulating valve 134 under the DFdf compartment and start the vacuum pump 142. During the continuous collection of materials in the BDbd compartment, the heating coil continues to heat the material, and the vacuum pump 142 continues to vacuum the material to initially remove the moisture in the material.

[0061] Set the program control time or when the BDbd compartment is full of materials, close the gate valve M1 and open the gate valve M2 to collect materials in the DFdf compartment. At this time, the BDbd compartment is a fully enclosed space. With the operation of the vacuum pump, the negative pressure in the space will drop rapidly (about -70kpa), and the water in the material will quickly vaporize and evaporate under negative pressure and high temperature. A large amount of water vapor passes through the filter 117 and enters the gas-liquid separation tank 141 for separation. The removed water is collected in the gas-liquid separation tank 141. At the same time, the water vapor discharge pipe 144 of the vacuum pump is connected to the top of the black water pool of the slag scooper, and a small amount of unseparated water is also discharged into the black water side of the slag scooper through the water vapor discharge pipe 144 of the vacuum pump, which recovers water resources to the greatest extent and avoids the random discharge of waste gas on site.

[0062] During the vacuum drying and dehydration process of the BDbd compartment materials, the DFdf compartment materials are also collected (automatically controlled by a time program, the material collection process takes about 30 minutes). At this time, the regulating valve 134 below the DFdf compartment is opened and the other valve is closed. At this time, the vacuum system begins to vacuum dry and dehydrate the materials in the DFdf compartment. At the same time, the gate valve M3 is opened to unload the dehydrated materials in the BDbd compartment to the slag truck 150. After the unloading is completed, the gate valve M1 is opened and M2 is closed, and the next cycle of collecting materials, heating and vacuum drying processes in the BDbd compartment is started. This cycle is carried out. The moisture content of the coarse slag after dehydration can be guaranteed to be below 10%, and then it is sent out by the slag truck 150 for processing. No water will be spilled during the transportation process, which is clean and environmentally friendly.

[0063] In addition, the gas-liquid mixture after vacuum dehydration enters the gas-liquid separation tank 141, and a liquid level alarm and a trigger switch are provided on the gas-liquid separation tank 141. When the gas-liquid separation tank 141 is at a high liquid level (liquid level > 80%), the system automatically stops the vacuum pump 142, starts the filtrate pump 143, and returns the filtrate to the black water pool of the slag remover through the filtrate recovery pipe 145 for recycling, thereby reducing the water resource consumption of the device; when the filtrate in the gas-liquid separation tank 141 is at a low liquid level (liquid level < 15%), the system automatically stops the filtrate pump 143, starts the vacuum pump 142, and performs normal vacuum drying and dehydration operation.

[0064] The test found that the moisture content of the treated coarse slag was low, and the equipment investment and operating costs were low. At the same time, a large amount of water was recovered, realizing the closed-loop circulation and recycling of the water channel, which was efficient and environmentally friendly. At the same time, the on-site production environment was clean, which improved the civilized production level on site.

[0065] In summary, the embodiments of the present invention provide a vacuum drying and dehydration device and a gasification furnace system, which is a dehydration system that integrates vacuum and heating drying, avoiding the operational defects of conventional sedimentation, vibrating sieve or high-temperature drying methods currently used. Compared with the prior art, it has the following technical advantages:

[0066] (1) In general operating factories, there is a lot of hot water, condensate or steam at a higher temperature of 70-100°C. This part of the heat source has no utilization and recycling value in many factories, so most of it is discharged on-site. This application can use this type of heat source to heat liquid-containing waste solids, effectively recycle the heat source, and improve energy utilization.

[0067] (2) By dividing the hopper into two compartments, the two compartments circulate the discharged liquid-containing waste solids, so that a single compartment can be fully sealed during the dehydration process, ensuring the vacuum degree and temperature of the hopper, improving the vacuum and heating drying effects, and also realizing continuous material receiving.

[0068] (3) The inlet and outlet designs of the hopper of the present application are superior to those of conventional hoppers. The inlet of the hopper of the present application is inclined inwardly, which is conducive to the reception of materials; the outlet adopts a flat design (the conventional outlet is a downward cone), which increases the contact surface between the dehydrated material and the vacuum pump, preventing the material from excessively piling up and reducing the vacuum effect.

[0069] (4) The outstanding advantage of the present application is that according to the principle that pressure reduction leads to a decrease in the boiling point of water, while the temperature of the liquid-containing waste solid is increased, the spatial pressure is reduced in the closed space where the material is processed, forming a negative pressure, so that the moisture carried on the surface of the material and the internal water in the gaps of the material undergo phase change and vaporize, thereby achieving the purpose of efficient moisture removal.

[0070] (5) Compared with the traditional process, the present application strengthens the automatic operation control of the gas-liquid separation tank and the recycling of water resources. A liquid level control and interlock switch are installed on the gasification separation tank, and the signal is connected to the motor of the vacuum pump and the filtrate pump. When the gas-liquid separation tank is at a high liquid level, the system automatically stops the vacuum pump, starts the filtrate pump, and returns the filtrate to the device through the filtrate recovery pipe for recycling, thereby reducing the water resource consumption of the device; when the filtrate in the gas-liquid separation tank is at a low liquid level, the system automatically stops the filtrate pump, starts the vacuum pump, and performs normal vacuum drying and dehydration operation.

[0071] (6) The equipment of the present application is simple in design, and does not have the complicated processes of primary dehydration and secondary dehydration in conventional technology. It occupies a small space and does not add additional large equipment. The treated coarse slag has a low moisture content, and the equipment investment and operating costs are low. At the same time, a large amount of water is recovered, which is efficient and environmentally friendly.

[0072] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A vacuum drying and dehydration device, characterized in that: It includes a hopper, a gas-liquid separation component and a gas-liquid delivery pipeline, wherein a partition plate is arranged in the hopper to divide the hopper into a first hopper and a second hopper; The first hopper and the second hopper each include a hopper body with openings at the top and the bottom, a top gate valve for sealing the top of the hopper body, and a bottom gate valve for sealing the bottom of the hopper body. The top openings of the hopper bodies of the first hopper and the second hopper each face the feed port of the gasifier, and the top gate valve and the bottom gate valve are both detachably connected to the hopper body. The gas-liquid separation component includes a gas-liquid separation tank and a vacuum pump connected to the top of the gas-liquid separation tank, the gas-liquid delivery pipeline includes a first gas-liquid delivery pipeline and a second gas-liquid delivery pipeline, the inlet of the first gas-liquid delivery pipeline is connected to the first hopper, the inlet of the second gas-liquid delivery pipeline is connected to the second hopper, and the outlets of the first gas-liquid delivery pipeline and the second gas-liquid delivery pipeline are both connected to the inlet of the gas-liquid separation tank; the first gas-liquid delivery pipeline and the second gas-liquid delivery pipeline are both provided with regulating valves; The hopper is provided with a heater for heating the first hopper and the second hopper; The height of the other end surface of the first hopper opposite to the partition plate is higher than the height of the partition plate, and the height of the other end surface of the second hopper opposite to the partition plate is higher than the height of the partition plate, so that the top end surface of the hopper is low in the middle and high on both sides; The inlet end of the first gas-liquid delivery pipeline extends from the bottom gate valve on the first hopper into the first hopper, and the inlet end of the second gas-liquid delivery pipeline extends from the bottom gate valve on the second hopper into the second hopper; the first gas-liquid delivery pipeline and the second gas-liquid delivery pipeline both include vertical hoses, and the regulating valves on the first gas-liquid delivery pipeline and the second gas-liquid delivery pipeline are both located between the vertical hoses and the bottom gate valves; The first hopper and the second hopper are used alternately and cyclically.

2. The vacuum drying and dehydration device according to claim 1, characterized in that: The bottom gate valve and the top gate valve on the first hopper and the second hopper each include a valve plate for serving as a sealing cover; The valve plates on the two bottom plug-in valves are both provided with side plates arranged around the valve plates, the top walls of the side plates are provided with filter screens, and the side plates and the valve plates form a filtrate tank for containing filtrate.

3. The vacuum drying and dehydration device according to claim 2, characterized in that: The bottom gate valve and the top gate valve on the first hopper and the second hopper each include a driving member for driving the valve plate to control the bottom gate valve and the top gate valve to be opened or closed.

4. The vacuum drying and dehydration device according to claim 2, characterized in that: The valve plates of the bottom gate valve and the top gate valve are both provided with sealing members for sealing connection with the top or bottom of the hopper.

5. The vacuum drying and dehydration device according to claim 1, characterized in that: The heater includes a heating coil disposed around the hopper body on the first hopper and the second hopper.

6. The vacuum drying and dehydration device according to claim 1, characterized in that: It also includes a filtrate pump, and the feed end of the filtrate pump is connected to the bottom of the gas-liquid separation tank.

7. The vacuum drying and dehydration device according to claim 6, characterized in that: It also includes a controller, and a liquid level detection mechanism is also provided on the gas-liquid separation tank. The liquid level detection mechanism is communicatively connected to the controller, and the filtrate pump and the vacuum pump are electrically connected to the controller, so that the controller controls the operation of the filtrate pump and the vacuum pump according to the detected liquid level information.

8. A gasifier system, characterized in that: The vacuum drying and dehydration device comprises the vacuum drying and dehydration device according to any one of claims 1 to 7.

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